Give me the answer of this fast
(1) Find mean deviation about mean.
C.I | 0-100 | 100-200 | 200-300 | 300-400 | 400-500 | 500-600 |
f | 4 | 8 | 9 | 10 | 7 | 5 |
C.I | 0-100 | 100-200 | 200-300 | 300-400 | 400-500 | 500-600 |
f | 4 | 8 | 9 | 10 | 7 | 5 |